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7. 1 seem him somewhere before.

   A. seeing   B. to be seeing.

   C. to have seen   D. having seen

7. C

7. C解析:seem后接不定式,由句意知 see的动作已经完成,故用to have seen。

题目来源:2016年周测月考直通高考高中英语必修4外研版 > 周内课时练22 Period 2 Introduction & Reading and Vocabulary—Language points

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